メタデータ
| 項目 |
値 |
| Designation |
C/2011 R1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-10-19T14:54:08.481600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:56Z |
| Obs used |
1454 |
| NEO |
- |
| M1 |
9.900 |
| K1 |
6.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-10-24.0000000 |
| e |
1.00074117 |
| q (au) |
2.079571 |
| a (au) |
-2805.810838 |
| i (deg) |
116.196842 |
| Ω (om, deg) |
221.408458 |
| ω (w, deg) |
308.861192 |
| M (ma, deg) |
0.000029 |
等級
散乱 + 全体線形
$$
M_a = (10.666 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.666 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| δ90 |
10.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2010-10-11 |
2012-04-01 |
+7.1902 |
-6.300 |
| 2012-04-01 |
2012-10-15 |
-6.1910 |
-0.092 |
| 2012-12-23 |
2013-02-17 |
+39.6659 |
-16.680 |
| 2013-02-17 |
2014-04-11 |
+3.1359 |
-1.430 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
10:35:18.15 |
+79:44:54.2 |
HIP 52096 |
11.65 |
| 2026-06-01 12:00 |
10:35:18.04 |
+79:44:01.8 |
HIP 52096 |
12.23 |
| 2026-06-02 00:00 |
10:35:18.09 |
+79:43:09.3 |
HIP 52096 |
12.83 |
| 2026-06-02 12:00 |
10:35:18.31 |
+79:42:16.8 |
HIP 52096 |
13.46 |
| 2026-06-03 00:00 |
10:35:18.70 |
+79:41:24.3 |
HIP 52096 |
14.11 |
| 2026-06-03 12:00 |
10:35:19.25 |
+79:40:31.8 |
HIP 52096 |
14.78 |
| 2026-06-04 00:00 |
10:35:19.97 |
+79:39:39.3 |
HIP 52096 |
15.47 |
| 2026-06-04 12:00 |
10:35:20.85 |
+79:38:46.8 |
HIP 52096 |
16.17 |
| 2026-06-05 00:00 |
10:35:21.89 |
+79:37:54.3 |
HIP 52096 |
16.88 |
| 2026-06-05 12:00 |
10:35:23.10 |
+79:37:01.8 |
HIP 52096 |
17.61 |
| 2026-06-06 00:00 |
10:35:24.46 |
+79:36:09.3 |
HIP 52096 |
18.34 |
| 2026-06-06 12:00 |
10:35:25.99 |
+79:35:16.8 |
HIP 52096 |
19.08 |
| 2026-06-07 00:00 |
10:35:27.68 |
+79:34:24.4 |
HIP 52096 |
19.83 |
| 2026-06-07 12:00 |
10:35:29.52 |
+79:33:32.0 |
HIP 52096 |
20.59 |
| 2026-06-08 00:00 |
10:35:31.53 |
+79:32:39.6 |
HIP 52096 |
21.35 |
| 2026-06-08 12:00 |
10:35:33.69 |
+79:31:47.2 |
HIP 52096 |
22.12 |
| 2026-06-09 00:00 |
10:35:36.00 |
+79:30:54.9 |
HIP 52096 |
22.89 |
| 2026-06-09 12:00 |
10:35:38.47 |
+79:30:02.6 |
HIP 52096 |
23.67 |
| 2026-06-10 00:00 |
10:35:41.10 |
+79:29:10.4 |
HIP 52096 |
24.45 |
| 2026-06-10 12:00 |
10:35:43.88 |
+79:28:18.2 |
HIP 52096 |
25.23 |
| 2026-06-11 00:00 |
10:35:46.81 |
+79:27:26.0 |
HIP 52096 |
26.02 |
| 2026-06-11 12:00 |
10:35:49.89 |
+79:26:33.9 |
HIP 52096 |
26.81 |
| 2026-06-12 00:00 |
10:35:53.12 |
+79:25:41.9 |
HIP 52096 |
27.60 |
| 2026-06-12 12:00 |
10:35:56.51 |
+79:24:49.9 |
HIP 52096 |
28.40 |
| 2026-06-13 00:00 |
10:36:00.04 |
+79:23:57.9 |
HIP 52096 |
29.19 |
| 2026-06-13 12:00 |
10:36:03.72 |
+79:23:06.1 |
HIP 52096 |
29.99 |
| 2026-06-14 00:00 |
10:36:07.55 |
+79:22:14.3 |
HIP 52096 |
30.79 |
| 2026-06-14 12:00 |
10:36:11.52 |
+79:21:22.5 |
HIP 52096 |
31.59 |
| 2026-06-15 00:00 |
10:36:15.64 |
+79:20:30.9 |
HIP 52096 |
32.40 |
| 2026-06-15 12:00 |
10:36:19.91 |
+79:19:39.3 |
HIP 52096 |
33.20 |
| 2026-06-16 00:00 |
10:36:24.31 |
+79:18:47.9 |
HIP 52096 |
34.01 |
| 2026-06-16 12:00 |
10:36:28.86 |
+79:17:56.5 |
HIP 52096 |
34.81 |
| 2026-06-17 00:00 |
10:36:33.55 |
+79:17:05.2 |
HIP 52096 |
35.62 |
| 2026-06-17 12:00 |
10:36:38.38 |
+79:16:13.9 |
HIP 52096 |
36.43 |
| 2026-06-18 00:00 |
10:36:43.35 |
+79:15:22.8 |
HIP 52096 |
37.24 |
| 2026-06-18 12:00 |
10:36:48.45 |
+79:14:31.8 |
HIP 52096 |
38.05 |
| 2026-06-19 00:00 |
10:36:53.69 |
+79:13:40.9 |
HIP 52096 |
38.86 |
| 2026-06-19 12:00 |
10:36:59.07 |
+79:12:50.1 |
HIP 52096 |
39.67 |
| 2026-06-20 00:00 |
10:37:04.58 |
+79:11:59.4 |
HIP 52096 |
40.48 |
| 2026-06-20 12:00 |
10:37:10.23 |
+79:11:08.9 |
HIP 52096 |
41.29 |
| 2026-06-21 00:00 |
10:37:16.01 |
+79:10:18.4 |
HIP 52096 |
42.10 |
| 2026-06-21 12:00 |
10:37:21.92 |
+79:09:28.1 |
HIP 52096 |
42.91 |
| 2026-06-22 00:00 |
10:37:27.96 |
+79:08:37.9 |
HIP 52096 |
43.73 |